ATR0842

Features Current-controlled Output Current Source with 4 Input Channels Two Selectable Outputs for Grounded Laser Diodes Output A Suited for Blue Laser Diodes: VLD ≤6 V (VCCH ≤8 V) LVDS/CMOS Compatible Inputs Channel 2, 3, and 4 Output Current per Channel up to 350 mA Total Output Current up to 500 mA On-chip RF Oscillator Control of 2 Different Frequencies and Swings by Use of 4 External Resistors Oscillator Frequency Range from 200 MHz to 500 MHz Maximum Oscillator Current Amplitude 100 mApp Small Pb-free QFN24 4 mm × 4 mm Package www.DataSheet4U.com Applications DVD Blue Laser DVD-RAM/DVD-RW/DVD+RW with CD-RW Capability Recordable Optical Drives 4-channel LVDS Laser Diode Driver with High Voltage Output for Blue Laser ATR0842 Summary Description The ATR0842 is a laser diode driver designed to operate two differently grounded laser diodes. The output, IOUTA, can be used for a blue laser diode (400 nm) with up to 6 V voltage drop by applying 8 V at pin VCCH. The other output, IOUTB, supports legacy laser diodes for DVD-RW/+RW/RAM (650 nm) and CD-RW (780 nm). The device includes four channels for four different optical power levels. The write channels (channel 2 to 4) can be controlled either by fast LVDS (Low Voltage Differential Signaling) or by single-ended standard CMOS logic. In case of single-ended use, each of the enable inputs (NEx or Ex) can be used, the complementary input may be left open. There is no need for blocking or connection ...